The present study is aimed at analysing the feasibility of bioelectrochemical treatment of bagasse-based paper mill wastewater. Bioelectrochemical treatment was carried out in dual-chambered microbial fuel cell with plain graphite plates as electrodes. Wastewater from sugarcane bagasse storage and washing units of paper mill was used as anolyte. High power density and current density of 53 mW m⁻² and 173 mA m⁻² at 470 Ω, respectively, could be produced with wastewater treatment efficiency of 85% and coulumbic efficiency of 6%. Whereas, wastewater from pulping and bleaching units of bagasse-based paper mill was not suitable for bioelectrochemical treatment, yielding low power density and current density of 4 mW m⁻² and 16 mA m⁻² respectively at 10,000 Ω. Later, treating blended wastewater containing bagasse wash water and pulping wastewater in the ratio of 9:1 v/v generated higher power density and current density of 73 mW m⁻²/202 mA m⁻², respectively, at 470 Ω, with wastewater treatment efficiency and coulumbic efficiency of 82% and 18%, respectively. Lignin and its derivatives present in pulping wastewater mediated electron transfer leading to high power density. Further, compounds in pulping wastewater were also toxic to methanogens growth in anode chamber of MFC, resulting in improved coulumbic efficiency of the blended wastewater treatment.

本研究旨在分析生物电化学处理甘蔗渣造纸废水的可行性。在以普通石墨板为电极的双室微生物燃料电池中进行生物电化学处理。造纸厂甘蔗渣储存和洗涤装置的废水用作阳极液。在 470 Ω 时，分别产生53 mW m ^-2和 173 mA m ^-2的高功率密度和电流密度，废水处理效率为 85%，库伦效率为 6%。而甘蔗渣造纸厂制浆和漂白装置产生的废水不适合生物电化学处理，产生的功率密度和电流密度较低，分别为 4 mW m ^-2和 16 mA m ^-2分别为 10,000 Ω。随后，以 9:1 v/v 的比例处理含有甘蔗渣洗涤水和制浆废水的混合废水，在 470 Ω 下分别产生了更高的功率密度和电流密度，分别为 73 mW m ^-2 /202 mA m ^-2 。处理效率和库伦效率分别为 82% 和 18%。存在于制浆废水中的木质素及其衍生物介导电子转移导致高功率密度。此外，制浆废水中的化合物对 MFC 阳极室中产甲烷菌的生长也有毒性，从而提高了混合废水处理的库伦效率。